Grinding-machine.



5J. E. GRANDALL. GRINDING MACHINE. APPLICATION FILED 111211.10. 1913.

. Patented sept. 16,1913;

' s SHEETS-$111212.

VJ. E. GRANDALL.` v(ErRUNTDHN'IG MACHINE. APPLICATION FILED APR. 10,1913.

Patented Sept. 16, 1913.

s SHEETS-SHEET a. v

UNITED STATES JAY ELLIS CRAND'ALL, or CHEREYVALLEY, ILLINoIs PATENToEErcE. y

GRIN DING-MAGHIN E.

To all whom t may concern Be it known that I, JAY ELLIS CRANDALL, acitizen of the United States, residing at Cherry Valley,in the county ofW'innebago and State of Illinois, have invented certain newand usefulImprovements in Grinding- Machines, of. which the following is aspecification.

rlhis invention relates to. grinding. ma'- chines andmore particularlyto that type of machine in which i-'t is desired to grind z a surface`oni athin articleof. tempered material without drawlng the temper fromthe article.

The' objectl of this-invention is to construct agrinding machine of.this type adapted for use in the forming of' corset-staysl suchas 'aredescribed in my patent application for l corset-stays, Seriell No.`751,526. tiled Feb.

20, 1913'. lIn the manufacture 'dfz this type of corset-stay it isdesired to form a portion ot t-helength et the stay gradually taperingtoward one end 'and leaving, an enlarged head atv said end sothat thetapered portion eration of. the driving means and both the stay carryingand grindingmea'ns.

A- fnrther object is toprovide anti-vibrator means to stop vibrating ofthe' stay during the course of its grinding.

Inthe accompanying.' drawings, Figure` l1 is af plian- View oli my novelgrinding'machine, showing the machine-.nr its inopera- 'iive position:Fig; 2is-.af view in elevation of the driveside of' the machine. Fig.. 3

- isfailonr 'tudina'l'verticaif seotionon the-line 3---3` o- Fig; 1,showing a corset-'stay A ment; Figiv is ad'etail planseotibnon themounted inthe vise.l Fig. Mis an enlarged plan section on the line MoiFig.. 3 shewing: the vise'moved tothe-endof its movelinei 5 5 ofLFig. 2,showing'f'thecamfor actuating the grinding spindle;` F 1g. 61s atransverse'v verticalf section-'on the-'line 6-6 of Fig. 1.4 Fi 7 is a:vertical1 section on the 'line7.7f 'of 1g; 6. Fig; 8 1s a-plan'sectl'onSpeeieation of Lettersv Patent. Application 'l'e'd April 10, 1913.Seri-a1 No. 760,163.

Paten-fea 'on the line 8--8 of Fig. 2 illustrating the parts in aposition when the carriage. has just started its forward feed strike.Fig. 9 is a vertical section' on the linev 9 9 `of Fig. 1. A

rI-he base 10 of'thevina'chine isisuppor'ted by standards 11,. has twocentral-ly disposed longitudinaly ways 112I formed-therewith, and Vhasoppositely extendingrwing sections 13.

Mounted sl-idably upon` the Ways 12 is the carriage' 14 in the fornioi?v anI oper-1 A top reservolr having extending ylon'gti-idinallyA fromits straight endtwo arms 1 5 and 16.

Mountedl upon the extending sections 1 3' are supports 17 and l18', thesupport' 17 beingsecu-red ixedt'y in position and the support 18 beingmovably mounted, movable from the pivot 19 of itsy arm 2O from' the base10,- as is seem in Fig.' 7- jafnd is held in position by the clamp 21bolted tothe base 10;- Vhaving an adjustable bearing plate 22 engagingan extensionf23'efthe support. The upper ends of these supports areformed with: horizont-al ways- 24 upon which are slidablymoi-intedgspindle bracketsupports 25- having upstaind-infg bracketportions 26. Bolted-to 'said bracketportions are the nspinsept. 16,1913.

dle supports 27 each having. an upper and lower vertically disposed'bearing 28 and' l ,ourna-ledf in the bea-rings are spindles` 29 `havinglXedl-y mounted attheir oentenportion the drive pulleys 30- and at theirlower ends the ga'inding'wheels 3'1 of a. suitable com-position ofmaterial-2, the spindlejlsupports capable of being.v raised fromposlti-on by removing their linner supportingbolts4 and being pivotedfrom'their outer supporting bol-ts. carried by supports 17 and 18' andvhave hand I feed nuts rotatably mounted` thereon',

Screws 32 (Fig. G). are .ixedly the spindle bracket supports 25beingmo'vble-with the 'hand nuts 33 'by theend plate connections 34,sothat by rotating the hand nuts 33 the grinding Wheels are4 adjustedto- Wardv or away from one another; Journafled' brackets bolted to therear end of the base 10 carry a shaft 36 uponwhichis mounted 'f 'idler'pulleys 37 adapted to guide Adrivingy belts (not`shown) which areadapted ,toI

rotate the-spindle pulleys 30- ata high rate adijustabl'ejgw 40.actuated by the hand llever 11, the vise' being.. so disposed that when?fai corset-stey'is clampedV horizontally .of speeds-LA vise/38 of@suitable construction' is fixed to ythe reservoir 1:1,. hav1ng 1n' thiscase shpwg) .onefwith ay rig1d" ].aw 39and an `2 Y I j 1,073,097 ytherein in the inoperatiwv positionof the machine as inifFig. 1,

said stay will lie intermediate the'gri'nding wheels, projecting b eyondtheir centenas is clearly shown in Mounted in'journal brackets 42 to theunderside of the base is the drive-shaftl 43 .which carries-,(Fig..9) adrive pulley 44 loosely mounted between the lined collars and having afemale clutch v'member 48'vformed therewith, a clutch 49 Splined to theshaft having a male clutch lugplutchmembers engage member 4S andortion'adapted to adapted to engage corresponding lugs on pulley44,'a`ndA a screwworm ixedly mounted upon thefshaft.

l.: ,A'worm-gear 51is rotatably mounted to the arm A15 through .bolt 53;

"underside of the base,

upon the ways 12.

meshing with screwworm 50, and a crank-arm' 52 operable .with theworm-wheelis connected to the end of thus rotation of the drive-shaft.'will reciprocate crank 52 and feed thecarriage' `14 longitudinally A camface 541'( Fig. is with the outerside of-carriage 14 adjacent support isheld yield- This contati-is yielding in the sense that the supportlispivotally mounted at'19 and the bell-"crank lever 56 pivotally carriedat 57 has anzfupstanding'arm 5S held into Contact with'-v the saidsupportby the weight 59 at the lower arm of the bell-crank, thus alwaysholding the plate 55 into contact .with the cam face but leaving it freeto move in the opposite direction.. Movementof the support 18following'thecam face moves theA grinding wheel carried thereby to andaway fromthe iXed wheel. Fig. 5 shows the inoperative position `of themachine with the cam highest portionr 60 of the cam whichmain- 'tainsthe grinding wheels spaced apart 1noperatively, but

when the carriage 14 isfed .forward the cam follower .will move torthetapered face 61 and follow the gradual. ta.- per thereof,l and thusbring the grindingI wheels closer together, gradually,as they performtheir grinding operation. 1

'l `A clutch lever62 is pivoted at 63 to the base 10, has an operatmghandle 64 and an arm 65 which carries a roller in engagement with theclutch 49. A spring 66 tends 'to holdthe clutchlever with theclutch inengagement with the lis adapted to be disengaged from the clutch Vfemaleclutch 46,- and lever by the 4cam 78 carried vby arm 16;

but with themachine in its operative-posi- I .tion as in Fig. l carriedby carriage the adjustable stop'. 67 14 will contactpthe face 6B-l ofthe lever and hold it from engaging fixed adj ustably mounted case inFig. 4,

follower on the vthe top of its stroke so t -Inzthe present embodimentof my said clutch members.` When the lug clutch 'the water beingsuitably drained through the outlet 73, and a covering (not shown) isprovided for the open top of the carriage to confine the water fromvsplashing onto adjoining parts.

the catch 6 9 piv- Anti-vibrator rods 74 and 7 5- are carried throughthe support 72, positioned at opposite sides of a stay being ground, andat each side of the grinding point of the wheel. A water baffle-plate 76is carried-by rod 75- to help direct sprayed water to be confined to thegrinding wheels.

In the operation of the machine, withl the several operable parts inAthe position as shown in Fig. 1, grinding wheels 31 will be rotatedasabove stated, and both clutchv members 44 and 46 will be rotated inopposite directions without aecting `any of said operable parts. With acorset-stay in the vise as is seen in Fig. 3', the hand lever 64 will bepulled forward as shown in Fig. 8, thereby driving shaft 43 through'pulley 44 and being held in such position by the catch 69. Rotation ofthe drive-shaft will feed the carriage 14 forward through the worm-gear51 and crank 52, thereby. allowing plate 55 to follow the cam face 61and bring the grinding wheels into grinding contact with the sides ofthe corset-stay at a point, as illustrated in this a.t 77. As the feedof the carriage continues the grinding wheels will be brought closertogether grinding a gradual taper to the end of thev stay until the veryend of the stay vhas been ground, when thel traveling cam 78 willcontact catch 68, disengagingit from lever .62 and allowing the springl66 to throw the clutch 59 into engagement. with member 46 and therethe4drive, direction; of shaft 43. l 52C does lnot reach thatit will returnthe carriage, allowing the grinding wheels to polish the ground surfaceof the stay. When-the high point- 66 in the cam has been reached thewheels will be parted as above described and the stop 67 will contactface 68 of the lever 62, thereby disengaging the clutch members andstopping the operation of the operable parts.

Duringfthe feed strokes of the carriage the stay, because of itslightbody, is often caused to vibrate with such force that if it by reverseAt this point the crank were not for the anti-vibrator rods 74 and 7 5the stay\would be immediately severed by the grinding wheels.

griuding machine I have'illiistrated but one of the grinding wheelsasbeingmounted to follow the. contourpf the grinding-operation,andr-itqwill be'v seenthatbothfwheels ,might be s'o-fmounted and .tofollow cammovements of whatsoever desirable The entire operation of thevmachine ,when

once set in motion is automatic thus producing grindingwi'thresult's'fofahigh 4eificiency andthe various adjus'tllents foriaccuratesetting and control of thegrlndlng .Wheels With a grinding lGroundwithout drawing the temperthero from, and furthermore, throughcontlrolof the grinding wheels, varying.'shapedv faces maybe obtained. c I claimas my invention. 5

1. In. a grinding machine,thefcombinm' tion with a reciprocableworkfholdingcarfriage, of a grinding wheel support movable toward andawa from work-carriedby ,said

carriage, a grin ing wheel 'for the support,

a grinding patternfor'- governingthemovevments of said wheelisupport,and I'nechaf nism for movingfsaid wheel sup'port towfi' said worksimultaneously' with the re'cipro cation of the carrie-gein onedirection, the support Aguided by said'V pattern, and for moving :thesupport retracing said pattern,

away from said work and sin'iultaneously;v with the returnreciprocatorymove'ment of said carriage.

2.' In Va grinding-machina the v'combinamoving tenerci-Said wheelstowardandaway from the othertooperate'upon said article Simultaneouslywith the reciprocation of said carriage, said mechanism' moving one ofsaid grinding wheels toward the other in a Ypredeterminedmovement'during the re" 'ciprocation of the carriage inone direction,and away from saidv other Wheel correspond- `ing ,tosaid predeterminedmovement and- .50

simultaneously withv the return of thecarriage from its said movement,whereby said article will be ground to a form corresponding to thepredetermined movementcf the one grinding wheel toward the other andreground to said form with said movement of thel grinding wheel awayfrom the other.

' a, vgrinding 'machina 'the combinaytionwith`5two grinding wheelsmounted with `[ft-heir grinding'faceslocated one opposite the other, ofmeans for carrying an elongated l`a1'.tiole' intermediate said grindingfaces and for moving the article between said faces lin* the-directionof its elongation, 'and' antivibrator means located adjacent the saidgrinding faces atene side of the article and machine' this vary. narrow;and flexible l articles 'may :be

adapted -to contact the article when the article vibra-tes during itssaid movement between the grinding faces. A

4;. In a -grinding machine, the combination of two grinding wheelsmounted with their e' grindingfaces positioned one oppo? .site the.other,fa' work holding carriage adapted to carry anelongated articleof asubstantially uniform thickness intermediate'said grinding faces,nieansformoving the carriage 'and' drawing the article between said faces,vmeans for simultaneously and positively feeding said grinding wheelstoward Seach other' tov grind a portion of the articleto agradual taper,in the direction of 'its-elongatiomand discontinue said taper at apredetermined point t'leave said'fend sub-v st-antiallywith its uniformthicknessl- 5. grinding 'maehine, the" combination of a4 workholding-carriage' ladapted'tocarry an elongated article ofsubsta-ntiallya uniform thickness, a grinding wheel'adapted tooperate upon, an'fac'eof said article,and

means for positively feeding said grinding l l wheel in itsl operationupon'the article to grind a gradual vtaper `thereon toward one endvofthe-article.v

l 6. 11i-fa grinding machine, the combina- -tion' offaswork holdingvcarriage;adapted to vcarry-'an article to be ground, a grinding wheel,a 'supportthereformounted'to move vin a planeparallel with'the'plane ofrotation of saidwheel to move the wheel into and out of Contact with thearticle to be ground, meansV for feeding the carriage to carry thearticle across'theface of the wheel,

andv means `coperating with the carriage'- and wheel support andoperable through the movement of said carriagefto control themovementofsaid wheel supportto andaway fro'mthearticle being ground; f

7. In a grinding machine, the combina- -tion with a reciprocableworkholdingcarriage and a grinding wheel, of driving 'mechanism forreciprocating the'carriage in opposite directions, operating means.coperating with said driving means to control 'the operation of' said*driving means, and means for automatically actuating said operatingmeans at Aa predetermined point in the reciprocation of'saicl carriageto reverse the reciprocation.

S..l'n a grinding machine, .the combination- Iof a reciprocablecarriage, two grinding wheels mounted with their grinding facespositioned one opposite the other and movable toward and away from eachother,` a work holding means mounted on the carriage and adapted tocarry an article to vbe ground intermediate said grinding faces, and incontact therewith, means for reciprocatingsaid carriage, drawing thearticle between said vrfaces, vand pattern regulated mechanism forcontrolling the movement of the article to feed the wheels together-tothe' cl u't'cjlimeinbers'causing theicarria'ge -to 55 'grind the articleupon the carriage being be'reciprocat'ed in one direction, means forreciprocated in one direct-ion, and move the holdingthe saidniechanismlfin said engaged grinding wheels to retrace said grinding'positiomjand means-.for .disengalgin'g sai upon the carriage beingreciprocated in the mechanism at a predetermined point in the oppositedirection. reci rocatio'n' of said carriage to allowsaid 60 T9. In agrinding machine, the combina- .mec vanism to be lengaged with the;other tion of two grinding wheels mountedv with clutch member. j' theirgrindingfaces positioned one-opposite 14.In a grinding machine, 'thecombina# the other, means 'for carrying an articleto tioni with areciprocable workjholding car- 4 be ground with one end of thearticlef'ree riage 'and a grinding wheel, of reversible- 65 and locatedintermediate said grinding drvi g mechanism for reciprocating .saidfaces, and adjustable means loca-ted x'e'd' carriage in oppositedirections,operating in relation to the grinding wheels, adjacent meanscoperating fwith said freversible" opposite sides df the articleinfii'onfconnecldriving 4means' and adapted to control the` tiontherewith to preventsaid article from operation of said driving means tothe .car- 70 vibrating. 'f riage-,and a member mvable simultane-l 10. Ina grindingiinachindthe combinaoiisly with 'the reciprocable movement oftion of two grindin'giavheelsl mounted with saidcarriagey and adapted toactuate said their grinding faces positionedone opposite operatingmeans'y atal predetermined@ point the other, .means".tonicarryng3 anlyarticle 'to in the reciprocation of4 said carriage;4 75

A be ground with' one end o at opposite sidespf the article.v

eai'ticlefree 15. vIn a grinding machine, thefco'nibin'aund locatedintermediate said lgrinding tion witha reciprocable work holding car'-faces, and an i-vibrator means located on i'iage and ,a, vgrindingwheelfof driving each side of glrinding contact ofsaid mechanismfforreciprocating "janey carriage grinding faces wi't operating'with saidldriving;. rneansito con- 11.' In a grindininachf'ne, twogrinding trolthe 'operation .ofsaidjfgriingnmeangf wheels mounted wit their Agrindingfaces lomean's for automatically actu tfingsaid' opei f catedoneopposite the other-and ada tedto erating means-.at a-l'iredeterinined point in;l Ay

operate upon an a ticle int'erposedt erebe-v thereciprocation ofthe j'reyerse Q tween/and anti'f "brator means spaced'from thereciprocatiomjand the article and'g'located adjacentftheadjalcallyBidfdriving". cency of said grinding faces.

f afpredetermined point in'saidre 12. In' a grinding machine".tliecombina-- rocation. `tion with a reciprocableworir holding car-v 16:lInvagrinding?-machineftliefoi) ina.- 90

.clutch .members and havin ,adrivingoon- 'carriage inop losit'edirections,

ringe and agrindin'grwheel, V off two clutch tionmith agrindiii'gwheeland'a members oppositely driven',f'ashiftable leii'igcarriage able-,relative '.f ver mechanism coperable with both oflsaid driving mechanism for' recip M nection with said reciproca lecarriage, the" fior. automatica ly reversin the clutch -membersfcim in'ica'rria'ge'to of' the reciinfocati on gagement with. the other causing'the carmined pointin the said reverse reciproca-4 ringe to be reversedin itsfiieciprocation. tion oftlie carriage; 13. In a grinding machine,'the combinar. testimony whereof I have lierei'mto sety tion with areeiprocabieworkholding car-v m `hand 'in\ presence' of-gtwo si1bscribinz riage and a grinding wheel, of two clutchy witnesses.

" ver mechanism 'coperable withibth of said members oppositely` driven,ay .shiftable le' JY ANDALL' clutch members and va.drivingconvf.Witnesessff.TV necti'on with saidreciproca le carriage,the` r W.-.'H.'PoUL'roN,

engagement of :said mechanism with'one, of Il/ 1. T. Jonas.

the article 'and 'spaced in opposite.d1rect'ons,operating means co- 80l

